<!-- 带涟漪效果的按钮 -->
<!DOCTYPE html>
<html>

<head>
  <style>
    .button {
      position: relative;
      background-color: #4CAF50;
      border: none;
      font-size: 28px;
      color: #FFFFFF;
      padding: 20px;
      width: 200px;
      text-align: center;
      transition-duration: 0.4s;
      text-decoration: none;
      overflow: hidden;
      cursor: pointer;
    }
    .button:after {
      content: "";
      background: #f1f1f1;
      display: block;
      position: absolute;
      padding-top: 300%;
      padding-left: 350%;
      margin-left: -20px !important;
      margin-top: -120%;
      opacity: 0;
      transition: all 0.8s
    }
    .button:active:after {
      padding: 0;
      margin: 0;
      opacity: 1;
      transition: 0s
    }
  </style>
</head>

<body>
  <h1>带动画效果的按钮 - 涟漪效果</h1>
  <button class="button">请点击我</button>
</body>

</html>